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Method for deblurring images using optimized temporal coding patterns

a temporal coding pattern and image technology, applied in the field of processing images, can solve the problems of reducing whole-image blur, unable to correct the blur of moving occluders, and deconvolution can produce strong noisy artifacts, so as to reduce whole-image blur and strong noisy artifacts

Active Publication Date: 2009-08-25
MITSUBISHI ELECTRIC RES LAB INC
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AI Technical Summary

Benefits of technology

The invention is about a new technique to reduce blur in images captured by cameras. Conventional cameras leave the shutter open for too long, which causes blur. The invention uses a shutter that is rapidly opened and closed in an irregular pattern to create an encoded image. This encoded image is then decoded to improve details in the image. The technique can be used with cameras, ultrasound sensors, and other devices that cause blur. The invention can be implemented externally or internally in the camera, and can include modulation of the shutter in various ways. The technical effect of the invention is to reduce blur in images, making them sharper and more detailed.

Problems solved by technology

Such techniques can reduce whole-image blur due to camera motion, but cannot correct blur from moving occluders.
In addition, deconvolution can produce strong noisy artifacts.

Method used

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  • Method for deblurring images using optimized temporal coding patterns
  • Method for deblurring images using optimized temporal coding patterns
  • Method for deblurring images using optimized temporal coding patterns

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Embodiment Construction

[0044]FIGS. 1A, 1B and 1C show simplified schematics of a deblurring camera according to embodiments of our invention. The camera includes a lens 110, a solid state image sensor 120, a shutter 130, and a shutter controller 140. In a preferred embodiment, the camera is a digital camera, and the sensor includes an array of pixels. The pixels can include RGB pixels interleaved in a Bayer grid. The camera can be a single photosensor. The camera can also be a digital video camera that produces a sequence of images or frames. An input image is produced on line 150 as a digital signal.

[0045]In the embodiment shown in FIG. 1B, the shutter functionality of FIG. 1A is implemented by a sensor controller 141 that can temporally turn the sensor 120 on and off while acquiring and integrating an input energy field 101. The energy field can be any type of electromagnetic radiation, e.g., visible or infrared light, or acoustic radiation, e.g., ultrasound and sonar.

[0046]In the embodiment shown in FI...

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Abstract

A method and system deblurs images acquired of a scene by a camera. A light field acquired of a scene is modulated temporally according to a sequence of ons and offs. An optimal coding pattern is selected. The modulated light field is integrated by a sensor of a camera during an exposure time to generate an encoded input image. The encoded input image is decoded according to a pseudo-inverse of a smearing matrix to produce a decoded output image having a reduced blur.

Description

RELATED APPLICATION[0001]This application is related to U.S. patent application Ser. No. 11 / 430,233 entitled “Method and Apparatus for Deblurring Images” and co-filed with this application by Ramesh Raskar on May 5, 2006.FIELD OF THE INVENTION[0002]This invention relates generally to processing images, and more particularly to deblurring images using optimized temporal coding patterns.BACKGROUND OF THE INVENTION[0003]Movement is an important aid to human visual perception. It helps us see, interpret and better understand our surroundings. Despite its usefulness to human viewers, motion is often the bane of photography. The clearest, most detailed image requires a perfectly stationary camera and scene. This is extremely difficult for amateur photography in natural settings.[0004]Conventional cameras include several manual or automatic controls to deal with various camera and scene parameters, such as focus depth and exposure time. However, the solutions for dealing with motion in a s...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G03B17/00H04N5/228H04N23/40H04N23/75
CPCH04N5/23248H04N5/23258H04N5/238H04N5/2353H04N5/2329H04N23/68H04N23/689H04N23/6812H04N23/73H04N23/75
Inventor RASKAR, RAMESHTUMBLIN, JACKAGRAWAL, AMIT
Owner MITSUBISHI ELECTRIC RES LAB INC
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